GRID-CONNECTED POWER-FREQUENCY RESPONSE STRATEGY FOR FRACTIONAL-ORDER VSG BASED ON LEAD-LAG CORRECTION

Li Meishu; Shi Rongliang; Zhang Lei; Li Junhui; Lai Zhenhui; Bai Xinyuan

doi:10.19912/j.0254-0096.tynxb.2025-0540

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (8) : 416-424. DOI: 10.19912/j.0254-0096.tynxb.2025-0540

GRID-CONNECTED POWER-FREQUENCY RESPONSE STRATEGY FOR FRACTIONAL-ORDER VSG BASED ON LEAD-LAG CORRECTION

Li Meishu¹, Shi Rongliang^1,2, Zhang Lei¹, Li Junhui², Lai Zhenhui¹, Bai Xinyuan¹

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Abstract

To address the challenging of trade-off between the active power transient response and inertia response characteristics of fractional-order virtual synchronous generators （FOVSGs） during grid-connected operation under abrupt variations of the active power command and grid frequency, a grid-connected power-frequency response optimization strategy based on lead-lag correction （LLC-FOVSG） is proposed. This strategy introduces a lead-lag correction block into the rotor motion equation of the FOVSG to constitute the LLC-FOVSG. By constructing a grid-connected power-frequency small-signal model of the LLC-FOVSG, a systematic tuning method for control parameters is achieved. Subsequently, a 100 kV·A FOVSG simulation model and a hardware testing platform are established for comparative tests. The results demonstrate the superiority of the proposed LLC-FOVSG over the conventional FOVSG in enhancing the power-frequency response performance of the grid-connected system.

Key words

virtual synchronous generator / control system / frequency response / fractional-order virtual inertia / lead-lag correction / small signal model / parameter design

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Li Meishu, Shi Rongliang, Zhang Lei, Li Junhui, Lai Zhenhui, Bai Xinyuan. GRID-CONNECTED POWER-FREQUENCY RESPONSE STRATEGY FOR FRACTIONAL-ORDER VSG BASED ON LEAD-LAG CORRECTION[J]. Acta Energiae Solaris Sinica. 2026, 47(8): 416-424 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0540

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